Riveting-machine pocket



May 24 1927. v

E. B. STIMPSON ET AL RIVB'XI'NG IACHINB POCKET Filed April 2, 1926 Patented May 24, 1927.

pairs!) sures PATENT OFFYIQE.

EDWIN B. s rnvrrson Ann HENRY v. mm, or ian-ooKLYN, NEW YORK; ASSIGNORS 'ro EDWIN B. s'rIMrsoNcoMrANY, or BRQ KLYN, NEW YORK.

' RIVETING MACI-IINE 1 POCKET.

. Application filed April 2,

vary over a considerable range as to length of shank. 1

Still another object, whose accomplishment follows from the construction last above referred to, is to make it possible to shorten the driving stroke of the machine, and consequently to lessen the effort required in operation. I

Other objects and aims of the invention, more or less broad than those stated above, together with the advantages inherent,fwill be in part obvious and in part specifically referred to in the course of the following description of the elements, combinations, arrangements of parts, and applications of principles constituting the invention; and the scope of protection contemplated will appear from the claims.

In the accompanying drawings, which are to be taken as part of this specification, and in which we have shown merely a preferred form of embodiment of invention,

Fig. 1 is an elevation showing parts of the riveting feeding, holding and driving mechanism of a riveting machine;

Fig. 2 is an elevation of the pocket; I

Fig. 3 is a section, with parts broken away and parts in elevation, taken on the line 33 of Fig. 2; 1

Fig. 4 is a section taken on the line 44 of Fig. 3.

Referring to the numerals on the drawings, there is shown at 7 a portion of the head of a riveting machine, in which operates the driving plunger 8. Rivets shown at 9 are fed by gravity down inclined chute 10 from which they are'released one at a time by a feed slide in the usual manner. The rivet holding, guiding and controlling members are located below and at'the end of the feed chute, beneath the plunger, and

poses of ready removability, I equipped wit-ha thumb-screw 17. ;This con- 1926. Serial No. 99,207.

consist'of a so-called pocket, comprising a pair of cooperating members 11 and 12, carried at the lower ends of spring arms 13 v and l t-shown as seated in recesses, 15 in the V opposite sides of a portion of the head, and

as held there-in by a bolt 16 which, for puris shown struction enables the pocket members to .yield during the passage of the rivet therethrough and to firmly hold the rivet during such passage. The pocket members have meeting flat surface 18, and each member excavated so that when the fiat'faces are ln contact, as in Fig. 2, there exists a'tubular passage having an enlarged part 19 of a size to receive the heads of the rivets,while below the head-receiving portion or seat 19 extends a straightaway passage, terminating in a' gradually contracting'throat 20. The edges of the pocket members adjacentthe end of the'feed chute are cut away from top -to bottom, so; that when the pocket members are m-the Flg. 2 position, with no rivet in place, there is anopen slot 21 from the upper end of the pocket to the .lower end thereof, of such'width as to permit the unrestricted entrance, laterally into the pocket ofrivet shanks whose lengths may'beggre'ater than the length of the pocket. In the wall of thehollowed-out' part of each pocket member we provide a groove 22, extending vertically of the pocket, beginning at a point just below the ledge or seat 19, running down through the greater part of the length of the pocket, preferably short of the contracting throat, and decreasing in depth at and towards its ends.

Operation.

As the. lowermost rivet in the inclined chute is released by the feed slide it drops down into position beneath the plunger, the head of the rivet seating itself on the ledge 19 and the shank passing through the slot 21. In Fig. 3 the rivet is shown (in dotted lines) with the rivet shank swinging through slot 21, while itsv final position is shown in full lines.

As the plunger descends it engages the head of the rivet and forces the rivet downwardly, thereby forcing apart the springpressed pocket members, finally driving the rivet out of the pocket. In this movement so Y both the head and shank of the rivet are positively guided and held under control, the shank by the contracted throat of the pocket 'and the head by the walls of the main pocket passage. Control of the head, particularly in case the head is slightly out of round, is assisted by the grooves 22, the edges of which offer additional line contacts with the head, so that the pocket walls actually have more contacts, but less contact, with the head. Of course, as the head comes in contact with the contracting throat walls of the lower end of the pocket the straight line movement of the rivet as it leaves the pocket is insured and overturning prevented. 7

Because movement of the rivet into the pocket is unrestricted, by reason of the open slot 21, it is evident that the pocket will receive rivets having shanks longer than the pockets themselves. This is an important feature, as will'be appreciated on inspection ofold constructions, in which there is.

a slot corresponding to slot 21, but which does not extend the full length of the pocket members, being closed, when the pocket is in closed position by meeting portions of the pocket members. The result of this heretofore usual structure is that if one at tempts to feed to such a pocket a rivet having a shank longer than the length of the slot, the shank may not get into the pocket,

at all-with possibility ofjamming, &c.

Furthermore, by the use of our open slot we are enabled to reduce the length of the pocket, which means that the anvil maybe brought-nearer to the plunger. Therefore the plunger stroke may be reduced, and so the stroke of the operating treadle brought ently widely difierent embodiments of our invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. j V

It is also to be understood that the language used in the following claims is intended to cover all the generic and specific features of the invention herein described and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

We claim 1. A pocket of the kind described comprising matching spring-pressed members formed to define between them a rivet-passage having a-surrounding rivet-headle'dge at its upper end and a. contracting throat at its lower end, and with an open slot of such width extending the full length of the pocket as to permit the unrestricted entrance laterally into the pocket of rivet shanks whose lengths may be greater thanthe length of the pocket.

2. The device set forth in claim 1, in which the inner walls of the pocket are provided with grooves that begin below the ledge.

In testlmony whereof we afiiX our signatures. 

